KS Pesticide Applicator cheat sheet

Integrated pest management combines biological, cultural, mechanical, and chemical tactics, with pesticides used only when scouting and thresholds indicate a need.

Economic threshold is the pest density at which treatment cost equals expected crop loss; action threshold may be set lower to prevent reaching the economic injury level.

The disease triangle requires a susceptible host, a virulent pathogen, and favorable environment; management removes at least one of these components.

Insects with complete metamorphosis pass through egg, larva, pupa, and adult stages; larvae are often the damaging feeding stage, while pupae do not feed.

Weeds are classified by life cycle as annual, biennial, or perennial, by morphology as grass, broadleaf, or sedge, and by habitat; identification guides control timing.

Resistance management rotates herbicide sites of action or insecticide IRAC groups and integrates nonchemical tactics to reduce selection pressure.

Scouting uses a defined sampling pattern, counts pests, and records crop growth stage; pest identification to species precedes selection of a control tactic.

Natural enemies such as predators and parasitoids can suppress pests; broad-spectrum products may disrupt them and cause secondary pest outbreaks.

Plant damage symptoms such as chlorosis, necrosis, stunting, and wilting can result from pests, diseases, nutrients, or environment; diagnosis requires more than symptoms alone.

Acute toxicity is expressed as LD50 in milligrams per kilogram or LC50 in milligrams per liter or ppm; lower values indicate greater toxicity.

EPA signal words include DANGER-POISON with skull and crossbones for Category I poison, DANGER for Category I non-poison, WARNING for Category II, and CAUTION for Category III; Category IV has the lowest toxicity.

Exposure routes are dermal, inhalation, oral, and ocular; dermal exposure is the most common route for pesticide applicators.

Label PPE requirements can include gloves, coveralls, respirator, eyewear, boots, and apron; chemical-resistant materials vary by formulation.

Restricted-entry interval is the minimum time after application before workers may enter a treated area without label-required PPE.

Organophosphate and carbamate poisoning may cause cholinesterase inhibition; symptoms include salivation, sweating, pinpoint pupils, vomiting, weakness, and respiratory problems.

First aid for dermal exposure is to remove contaminated clothing, wash skin with soap and water, and get medical help with the label or safety data sheet available.

Heat stress risk rises with PPE use and hot weather; signs include headache, nausea, dizziness, confusion, and stopped sweating, requiring cooling and medical evaluation.

Eating, drinking, smoking, and chewing gum are prohibited while handling pesticides; handwashing is required before breaks and after work.

The label is the law; use must be consistent with label directions, and off-label use is a violation unless specifically permitted by EPA or the state.

EPA registration number identifies the registered product; it is not by itself a guarantee of safety or efficacy.

Signal word, precautionary statements, and PPE appear on the label; the Directions for Use section controls rates, sites, timing, and methods.

Preharvest interval is the minimum number of days between the last application and harvest for a labeled crop.

Restricted-entry interval appears on the label and may differ by site and application method.

Restricted-use pesticides may be applied only by or under the direct supervision of a certified applicator; sales and recordkeeping restrictions apply.

Tank-mix instructions include label order, compatibility testing, and labeled rate limits; some labels prohibit tank mixing.

Section 24(c) special local need registration allows a state to add a use; Section 18 allows emergency exemptions for unregistered uses.

Storage and disposal statements are label requirements; pesticide containers must not be reused and must be triple rinsed or pressure rinsed as directed.

GPA = (GPM × 5940) ÷ (MPH × nozzle spacing in inches) for broadcast boom sprays; GPM = (GPA × MPH × spacing) ÷ 5940.

Calibration measures effective swath and nozzle output over time, converts output to gallons per acre, and adjusts pressure, speed, or nozzle size.

Nozzle flow varies with the square root of pressure; doubling pressure increases flow by about 1.41 times.

Replace nozzles when flow exceeds 10 percent of new-nozzle output or when the spray pattern is visibly distorted.

Spray drift increases with smaller droplets, higher boom height, higher wind speed, lower humidity, and higher pressure.

Fine droplets improve coverage but increase drift; coarse droplets reduce drift but may reduce coverage.

Boom height and nozzle spacing determine spray overlap; flat-fan patterns must overlap uniformly to avoid streaks.

Agitation keeps suspension and emulsion formulations uniform; some formulations require continuous agitation.

Application speed changes GPA inversely when nozzle flow remains constant; faster speed lowers GPA.

Leaching moves pesticides downward with water; high solubility, low soil organic matter, sandy soils, and high rainfall increase risk.

Runoff moves pesticides across the soil surface into surface water; buffers, vegetative filter strips, and avoiding application before rain reduce risk.

Volatilization converts pesticide to gas; high temperature, low humidity, and high vapor pressure increase vapor drift risk.

Point-source pollution comes from mixing and loading, spills, and container rinsate; nonpoint-source pollution comes from field application and runoff.

Triple rinsing fills a container one-quarter to one-third full, rinses at least 30 seconds, drains into the spray tank, and repeats three times; pressure rinsing is an alternative.

Pesticide containers must be disposed of according to label and state rules; burning or reusing containers is prohibited unless the label allows it.

Spill cleanup stops the source, contains with absorbent, protects drains and water, collects waste, and notifies authorities when a spill is reportable.

Endangered species restrictions may require checking EPA Bulletins Live! Two for county-specific pesticide use limitations.

Pesticides are stored in original labeled containers, locked, ventilated, away from food and feed, and protected from freezing or heat per label.